New Super Mario Bros. 2 must settle for second place.
United Front Games' Sleeping Dogs, famous for being dropped by Activision, appears to have been worth the effort from publisher Square Enix - the game entered the UK video game chart at No.1.
Sleeping Dogs becomes the fifth best-selling game on first week sales in 2012.
Nintendo's New Super Mario Bros. 2 takes second place, pushing SEGA's London 2012 down to third place after three weeks at No.1.
LEGO Batman 2 slips to No.4, Mario & Sonic 2012 drops to No.5.
Elsewhere retailer promotions helped Ghost Recon: Future Solider and LEGO Harry Potter: Years 5-7 re-enter the Top 10 at No.8 and No.10, respectively.
Leisure software charts compiled by Chart Track, (C)2011 UKIE Ltd (All Prices) Week 33, 2012
1. SLEEPING DOGS
2. NEW SUPER MARIO BROS. 2
3. LONDON 2012: THE OFFICIAL VIDEO GAME
4. LEGO BATMAN 2: DC SUPER HEROES
5. MARIO & SONIC LONDON 2012 OLYMPIC GAMES
6. BATMAN: ARKHAM CITY
7. THE AMAZING SPIDER-MAN
8. TOM CLANCY'S GHOST RECON: FUTURE SOLDIER
9. DEAD ISLAND GOTY EDITION
10. LEGO HARRY POTTER: YEARS 5-7
11. THE ELDER SCROLLS V: SKYRIM
12. FIFA 12
13. BATTLEFIELD 3
14. MARIO KART 7
15. CALL OF DUTY: BLACK OPS
16. SKYLANDERS: SPYRO'S ADVENTURE
17. ASSASSIN'S CREED: REVELATIONS
18. SUPER MARIO 3D LAND
19. GRAND THEFT AUTO EPISODES - LIBERTY CITY
20. SONIC GENERATIONS
Whilst Sleeping Dogs appears a big hit, it won't be until sales figures are revealed that we really understand if Square Enix made a good call in picking up the discarded open-world action game.
Darksiders II and Transformers: Fall of Cybertron both hit stores this week, meaning Sleeping Dogs is unlikely to retain its No.1 position for a second week. We reckon Darksiders II could just pip the Transformers sequel to the top spot, but expect a close run race.
Dark Souls also makes its debut on PC, but with some negative press about its shoddy port we're not confident it will chart inside the Top 20.